547 results about "Hydrogenation process" patented technology

The invention provides a low-pressure hydroisomerization / cracking process for preparing bio-based aviation fuel, and relates to the technical field of biomass energy. A three-stage hydrogenation process is adopted, a low-temperature and low-pressure homogeneous hydrogenation method combining an oil soluble catalyst with a suspended bed reactor A and a suspended bed reactor B is adopted in the front stage of step (1) and step (2), low-cost hydrogenation upgrading pretreatment is conducted on high-silicon and high-metal biomass inferior grease, deep fixed bed hydrofining is conducted in the middle stage of step (1) and step (2), and high-silicon and high-metal biomass inferior grease is obtained. In order to improve the yield of light oil products, a rear-section fixed bed hydroisomerization reactor is additionally arranged to carry out isomerization / cracking processing on heavy components.

The invention discloses application of a Ni-based reverse-phase catalyst in catalytic hydrogenation reaction of a nitro compound, nitro in the nitro compound is hydrogenated to reduce amino, the Ni-based reverse-phase catalyst is of an M / Ni reverse-phase structure, metal Ni for dissociating hydrogen serves as a carrier, nano metal M oxide is loaded on the carrier to serve as a loading phase, and reverse-phase interface active sites are constructed; wherein the metal M is one or two of Ce, Zr, Al, Y and Mg, and the mole fraction of the load phase metal M is 5-50% based on the mole fraction of all the metals in the catalyst being 100%. The preparation method of the catalyst is simple and easy to implement, the catalyst has a non-traditional supported reversed-phase structure, the activity of the catalyst is more excellent than that of a traditional supported catalyst when the catalyst is applied to the nitro-compound hydrogenation process, a traditional Raney nickel catalyst can be effectively replaced, a reaction system is clean and safe, repeatability is good, effective recycling can be achieved, and the catalyst is suitable for industrial production. The method is suitable for industrial production and has a good application prospect.

The invention relates to the technical field of computer numerical simulation, discloses a multiphase flow coupling analogue simulation method and device, computer equipment and a storage medium, and is applied to a process for preparing methanol through CO2 hydrogenation by a liquid phase method. The method comprises the following steps: constructing an initial multiphase flow model of a gas-liquid-solid three-phase system based on a gaseous phase state parameter, a liquid phase state parameter and a particle phase state parameter in an initial reaction stage; combining and correcting the liquid phase state parameters and the particle phase state parameters so as to simplify the initial multiphase flow model into an equivalent multiphase flow model of a gas-slurry phase two-phase system; constructing a component transport model based on the equivalent state parameters of the equivalent multiphase flow model; and constructing a coupling simulation model by using the equivalent multiphase flow model, the component transport model and the reaction model, and carrying out iterative solution on the coupling simulation model to obtain an analogue simulation result of multiphase flow coupling. Therefore, high-efficiency and high-precision simulation of the stirring reaction process for preparing methanol through CO2 hydrogenation by the liquid phase method is realized.

The invention provides a preparation method of a nitrogen-doped non-noble metal catalyst. The preparation method comprises the following steps: mixing ethylenediaminetetraacetic acid, triethylamine, a nickel source and a cobalt source in a DMF (Dimethyl Formamide) solution, and aging; and centrifuging, drying and calcining at high temperature to obtain the nitrogen-doped non-noble metal catalyst with the average particle size of 10-50nm. According to the preparation method of the nitrogen-doped non-noble metal catalyst provided by the invention, the prepared nitrogen-doped non-noble metal catalyst has the following beneficial effects that the complex metal ions are adopted as the precursor, the nitrogen-doped non-noble metal nanoparticles are prepared by a high-temperature calcination method, and the catalyst obtained by the method has the characteristics of high dispersity, high catalytic activity and high catalytic activity. The preparation method is simple and good in repeatability; and the synthesis steps are simple, and the cost is low. The nitrogen element is introduced, so that the deamination reaction can be effectively inhibited, and the yield of m-phenylenediamine is improved. When the prepared catalyst is applied to an isophthalonitrile hydrogenation process, extremely high yield of m-phenylenediamine can be maintained under mild reaction conditions.

The invention discloses a hydrogen energy endurance supply regulation and control management system and method suitable for a hydrogen energy unmanned aerial vehicle, and belongs to the technical field of energy supply regulation and control. The method comprises the following steps: constructing a theoretical endurance mileage model, and calculating the theoretical endurance mileage which can be reached by the unmanned aerial vehicle in an ideal state after one hydrogen storage bottle is used up; collecting flight data of the unmanned aerial vehicle, inputting the flight data into a pre-trained artificial intelligence algorithm model, obtaining the endurance loss amount of the unmanned aerial vehicle in the current flight state, and further obtaining a first endurance mileage; a flight attitude combination used by the unmanned aerial vehicle in the flight process is obtained, and the predicted endurance mileage is calculated; based on the predicted endurance mileage of the unmanned aerial vehicle needing hydrogenation and the hydrogen capacity and the hydrogen concentration of the current remaining hydrogen storage cylinders, the unmanned aerial vehicle matched with the hydrogen concentration of the remaining hydrogen storage cylinders is screened out, and the hydrogen concentration of the hydrogen storage cylinders is preferentially distributed to the matched unmanned aerial vehicle; in the hydrogenation process, the required hydrogen energy capacity and the corresponding hydrogen concentration are calculated.

The invention discloses a vibeglycolone intermediate, a preparation method thereof and application of the intermediate in preparation of vibeglycolone, and belongs to the technical field of medicinal chemistry. The structural general formula of the vibeglycolone intermediate compound II disclosed by the invention is as follows: # imgabs0 # R1 is a silicon-containing hydroxyl protecting group. The invention also develops a new synthesis route of vibeglycolone by adopting the key intermediate, and by introducing a hydroxyl protecting group at the front end of the reaction, the stability of the intermediate compound is increased, the generation of oxidation impurities in the cyclization and hydrogenation process is effectively reduced, the purification problem in the synthesis process is greatly improved, the cost is saved, and the yield is increased. The synthesis efficiency is also improved, the obtained target compound vibeglycolone has higher purity, and the newly developed synthesis route is more suitable for industrial large-scale production.

The invention belongs to the technical field of automatic control, and particularly relates to a fault diagnosis and automatic control system of a packed bed continuous hydrogenation process device. The system comprises a model building part used for carrying out material balance modeling on a reactor to obtain a material balance model; establishing a reaction kinetics and heat balance coupling model; establishing a pressure field distribution model; establishing a catalyst inactivation model to obtain activity distribution of the catalyst; the state observation part is used for performing tensor decomposition on the fault deviation vector according to the activity degree part and the pressure distribution of the catalyst in combination with the concentration distribution and the temperature distribution of each component to obtain a fault feature tensor; and the diagnosis and automatic control part is used for calculating an abnormal state probability according to the fault feature tensor, generating a compensation controller according to the abnormal state probability, and performing automatic control by using the compensation controller. According to the invention, comprehensive monitoring and accurate control of the packed bed reactor are realized.

The invention discloses a hydrogenation safety control method and system based on adaptive robust filtering, and relates to the technical field of hydrogen energy, and the method comprises the steps: building a state prediction equation of a plurality of sensors in a hydrogenation process of a hydrogen refueling station based on Kalman filtering; constructing a filtering residual error based on the state prediction equation, and constructing a robust factor based on the filtering residual error; adjusting the initial observation noise covariance matrix of each sensor based on the robust factor to obtain an observation noise covariance matrix after robust adjustment; based on the health degree of each sensor, calculating a weight value corresponding to each sensor; dynamically adjusting the observation noise covariance matrix after the adversarial adjustment based on the weight value to obtain an observation noise covariance matrix after the weight adjustment; and based on the observation noise covariance matrix after weight adjustment and the state prediction equation, performing filtering updating on the state parameters of the plurality of sensors. The technical problem that in the prior art, the control precision and safety of a hydrogen refueling station are insufficient is solved.

The invention belongs to the technical field of functional sugar alcohol hydrogenation, and particularly relates to a system and a method for intelligently controlling a reaction kettle in a functional sugar alcohol hydrogenation process. Comprising a temperature sensor TT, a pressure sensor PT, a liquid level sensor LT, a hydrogen concentration sensor TZT and a spectrum sensor, and the sensor networks are arranged on a reaction kettle body, a feeding pipeline, a condenser and a hydrogen recovery device. The device is used for collecting temperature, pressure, liquid level and hydrogen concentration in the reaction kettle and spectral data of an outlet sugar alcohol product in real time. The control execution layer comprises a PLC (Programmable Logic Controller), a dynamic valve controller, temperature control equipment and a stirrer speed regulation module; and the dynamic valve controller is connected to the hydrogen supply pipeline and the feeding pump. The hydrogen flow, the temperature and the stirring speed are adjusted in real time through AI dynamic optimization, the sugar alcohol conversion rate is increased to 5%, and the conversion rate fluctuation range is reduced to + / -0.5%.

The present invention relates to the technical field of catalysts, and discloses a hydrogenation catalyst and a preparation method thereof, and a hydrogenation method of an organic hydrogen storage material, the method comprises: (1) mixing an active metal component precursor, a dispersion component precursor, an auxiliary agent metal precursor, an Al salt and a solvent to obtain a salt solution; wherein the active metal component is selected from Ni and / or Co, the dispersion component is selected from Zn and / or Mg, and the auxiliary metal is selected from at least one of rare earth metal, VIIB group metal, IVB group metal and VIB group metal; (2) contacting the porous carbon with acid under a stirring condition to obtain acid-treated porous carbon; (3) mixing the acid-treated porous carbon, a salt solution, a surfactant and alkali, and carrying out precipitation reaction; and (4) roasting the product obtained in the step (3) in an inert atmosphere. The hydrogenation catalyst prepared by the method shows extremely high activity in the hydrogenation process of a hydrogen storage medium.

The invention discloses a dialkyl maleate hydrogenation catalyst and a preparation method thereof. The dialkyl maleate hydrogenation catalyst comprises modified activated carbon and precious metal active components, the modified activated carbon is activated carbon with hydrophilic groups dispersed by hydrophobic groups on the surface, and the size of precious metal particles is smaller than 2.0 nm. The noble metal particles of the catalyst are small in particle size, the loading capacity of the noble metal on the carbon carrier is remarkably reduced, the conversion rate of the dialkyl maleate is 100% in the selective hydrogenation process of the dialkyl maleate, and the selectivity of the dialkyl succinate is greater than 99.5%.

The invention relates to the technical field of treatment of biological crude oil, in particular to a method for preparing traffic fuel oil from hydrothermal liquefied biological crude oil. The method comprises the following steps: carrying out distillation treatment on hydrothermal liquefied biological crude oil to obtain purified biological oil and distillation residues; carrying out hydrocracking reaction on the purified bio-oil to obtain cracked bio-oil; performing catalytic hydrogenation reaction on the cracked bio-oil to obtain refined bio-oil; and fractionating the refined bio-oil to obtain the traffic fuel oil. By means of the method, conversion from hydrothermal liquefaction of biological crude oil to traffic fuel oil which can be applied to diesel oil, gasoline and aero-engines is achieved. Distillation residues generated in the distillation process are subjected to metal recovery to prepare high-quality biochar for subsequent field returning. The hydrogen used in the hydrogenation process can come from hydrothermal liquefaction wastewater treatment, so that full recycling and energy regeneration of raw materials are realized.

The invention relates to the technical field of waste tire recovery, in particular to a method and a system for preparing biological aviation fuel by hydrogenation of waste tire pyrolysis oil, a pretreatment unit is used for performing multi-stage filtration and preheating treatment on the waste tire pyrolysis oil; the hydrogenation reaction unit is used for carrying out hydrogenation reaction and shallow cracking reaction on the pretreated waste tire pyrolysis oil; the separation and purification unit comprises a hot high-pressure separator, a dechlorination reactor, a cold high-pressure separator, a hot low-pressure separator and a cold low-pressure separator, and is used for carrying out dechlorination reaction and gas-oil-water separation treatment on a product of the shallow cracking reaction; the circulating hydrogen unit is used for providing mixed hydrogen for the system; and the fractionation unit is used for fractionating the product separated by the separation and purification unit to obtain the biological aviation fuel. According to the method, the waste tire pyrolysis oil is converted into the biological aviation fuel by adopting a series hydrogenation process, so that the problem of waste tire treatment is solved, and high-value utilization of resources is also realized.

The invention relates to a rapid hydrogenation system with a high hydrogen utilization rate and a working method thereof. The system comprises parallel multi-stage hydrogen storage bottle groups arranged at a station end, each stage of hydrogen storage bottle group is connected with a first switch valve and a second switch valve, each first switch valve is directly connected with a pressure reducing valve, and each second switch valve is connected with the pressure reducing valve after passing through a compressor; the other end of the pressure reducing valve is connected with a vehicle-mounted hydrogen storage bottle set at the vehicle-mounted end through a heat exchanger, and in addition, the heat exchanger is connected with a cooling module. According to the working method of the system, the multi-stage hydrogen storage bottle set and the compressor are used for achieving graded and standby direct hydrogen filling, and a booster pump and double cooling liquid boxes in the cooling module can be used for precooling work. Compared with the prior art, the hydrogen utilization rate can be improved while the hydrogenation rate can be guaranteed, and rapid precooling of large-flow hydrogen in the rapid hydrogenation process can be further guaranteed.

The invention discloses a Ce-MOF derived multi-metal oxide / ZSM-5-based composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of aviation kerosene preparation. The H-ZSM-5 molecular sieve is synthesized by adopting a hydrothermal method, and Ce-MOF is grown on the surface of the H-ZSM-5 molecular sieve in situ. The high specific surface area, developed pore structure and abundant unsaturated sites of the Ce-MOF material are utilized to realize efficient loading of various active metals. And drying and calcining to obtain the Ce-MOF derived multi-metal oxide / ZSM-5 composite catalyst with a stable structure. Rich oxygen vacancies and active sites can efficiently activate CO2 molecules and promote the hydrogenation process of the CO2 molecules and H2 to generate a key methanol intermediate; accurate carbon chain growth regulation coupling effect can be performed on the methanol intermediate, and the methanol intermediate is quickly and effectively converted. The catalyst prepared by the method provided by the invention has a regular pore structure and suitable acidic sites, and on the basis of the cage control shape selective catalysis principle of the H-ZSM-5 molecular sieve, the per-pass conversion rate of CO2 exceeds 25%, the selectivity of aviation kerosene components in hydrocarbon products reaches 70.5%, and the generation of methane by-products is effectively inhibited.

The invention discloses a green method for synthesizing hexamethylenediamine, which comprises the following steps: by taking adiponitrile and ethanol as solvents as raw materials and taking a porous cobalt-based catalyst and a solid base catalyst which are mixed according to a certain ratio as catalysts, reacting to obtain hexamethylenediamine at the reaction temperature of 70-90 DEG C under the reaction pressure of 2-5MPa H2 and the stirring rotating speed of 500-1000rpm. In the hydrogenation process, the two catalysts are mixed and added according to a certain proportion, and efficient conversion of adiponitrile and high selectivity of hexamethylenediamine can be realized under mild conditions. The catalyst used in the method is simple in preparation process, low in cost and easy to recover, the hexamethylenediamine synthesis process is green, and good economic benefits and application prospects are embodied. The method provided by the invention solves the problem that in the traditional process of synthesizing hexamethylenediamine through adiponitrile hydrogenation, inorganic alkali, such as sodium hydroxide, ammonia water and other strong corrosive additives, needs to be added, so that the conversion efficiency and selectivity are improved, the requirement on equipment is reduced, and meanwhile, the energy consumption of later separation is reduced.

The invention provides a preparation method of a hydrogenated cycloolefin polymer, which comprises the following steps: reacting a cycloolefin polymer with hydrogen in the presence of a hydrogenation catalyst and a hydrogenation aid to obtain the hydrogenated cycloolefin polymer, the hydrogenation auxiliary agent is selected from one or more of aliphatic dibasic acid esters, phthalate esters and benzene polyacid esters. Compared with the prior art, in the presence of the hydrogenation catalyst and the hydrogenation auxiliary agent, the cycloolefin polymer and the hydrogen are subjected to hydrogenation reaction, and an induced dipole is induced in the adjacent cycloolefin polymer through the hydrogenation auxiliary agent molecule with an inherent dipole; the molecular attraction between the induced dipole and the inherent dipole destroys the entanglement of the original molecular chain, and the friction force between the cycloolefin polymer molecules is reduced, so that the viscosity between the polymers is reduced, and the mass transfer effect of the reaction is improved; meanwhile, intramolecular electron conjugation can be inhibited, double bonds in molecules in the hydrogenation process can be damaged more easily, the hydrogenation efficiency is improved, and then the production efficiency is improved.

The invention provides a temperature accurate control and flow state optimization method for replacing dimethyl disulfide with sulfur in a coal tar hydrogenation process, which comprises the following steps: after acquiring a blockage risk distribution diagram, deploying a flow sensor and a pressure sensor at key nodes of a pipeline in combination with real-time monitoring capability, and collecting dynamic data of a sulfur flow state; flow stability parameters are obtained; according to the fluctuation amplitude, adjusted sulfur flow state data are obtained, the flow velocity and viscosity change of sulfur in the pipeline are calculated through fluid mechanics simulation, and the flow state optimization degree is determined; after a process suitability evaluation result is obtained, the operation cost and the economic benefit improvement range of the sulfur substitution scheme are calculated in combination with a cost accounting model, and the cost control effect is judged by comparing the reference cost of dimethyl disulfide; through a cost control effect, a time sequence prediction algorithm is adopted to analyze sustainability of temperature control and flow state optimization in long-term operation, and a comprehensive optimization scheme of production process stability and economy is obtained.

The invention discloses a catalyst for preparing cyclohexanone by cyclohexanol dehydrogenation coupled phenol hydrogenation, the catalyst has a composite metal hydrotalcite structure, the metal components comprise ruthenium, magnesium and aluminum, the metal components are uniformly dispersed in hydrotalcite, and the ruthenium, the magnesium and the aluminum respectively account for 1-5wt%, 10-30wt% and 1-10wt% of the total mass of the catalyst. The acid-base property, the specific surface area and the pore structure of the catalyst are optimized by adjusting the ratio of magnesium to aluminum, so that the dispersion of ruthenium is improved, the interaction between ruthenium and a hydrotalcite carrier is increased, and the synergistic effect of all the element components enables active centers in cyclohexanol dehydrogenation, hydrogen transfer and phenol hydrogenation processes to be efficiently combined together, so that the catalytic activity of the catalyst is improved. Rich alkaline sites are generated in the catalyst, the dehydration side reaction of cyclohexanol can be effectively inhibited, meanwhile, the selectivity of cyclohexanone prepared through phenol hydrogenation is improved, it is ensured that the phenol hydrogenation reaction and the cyclohexanol dehydrogenation reaction can be effectively coupled, and cyclohexanone is efficiently prepared.

Process for the hydrogenation of CO2 by reverse water gas reaction (RWGS) by contacting a feed of a gaseous mixture comprising CO2 and hydrogen with a catalyst comprising an active phase based on copper and indium, which process being carried out at a temperature between 0°C and 600°C, at a pressure between 0.1 MPa and 5 MPa, at a molar ratio of hydrogen / carbon dioxide between 0.1 and 10 and at an hourly volumetric rate between 100 h-1 and 40000 h-1.

The application provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oils, especially waste oils, using a homogeneous hydrogenation process with strong adaptability to raw materials as a raw material pretreatment process, and matching a high-activity nanometer transition metal sulfide catalyst. On this basis, a catalytic distillation process is used for selective cracking of long-chain alkanes to improve the yield of medium and long-chain alkanes; an ultramicro flow hydrogen gas mixer and a reduced non-noble metal hydrogenation-isomerization catalyst are used to reduce the hydrogen / oil ratio and the energy consumption of the circulating hydrogen system, and to reduce the production cost of the catalyst, so as to finally realize efficient and low-carbon conversion of waste oils, and low-cost and high-selectivity preparation of biological aviation kerosene.

The invention discloses a method for preparing 1,4-cyclohexanedimethanol from waste polyester as raw material, the method first hydrogenates the benzene ring under the catalytic action of a loaded noble metal catalyst to obtain an intermediate product poly-1,4-cyclohexanedicarboxylic acid dibasic ester, the product of the first stage hydrogenation reaction is not separated and purified, and the second stage hydrogenation is directly carried out, and under the action of a copper-based catalyst, the ester group is reduced to an alcohol group to generate 1,4-cyclohexanedimethanol. The two-stage hydrogenation process uses the same reaction solvent and can be recycled, the waste polyester conversion rate reaches 100%, and the 1,4-cyclohexanedimethanol yield is up to 98%. The method has the characteristics of short process, few by-products, no intermediate product refining process and low energy consumption, can form a circulating process loop, and is suitable for large-scale production of 1,4-cyclohexanedimethanol.

The invention relates to the technical field of fossil energy hydrogen production, and discloses a combined heat and power generation coupled natural gas reforming hydrogen production system and a control method. The combined heat and power generation coupled natural gas reforming hydrogen production system comprises a raw material pretreatment unit, a natural gas conversion unit, a combined heat and power generation unit, a medium and low temperature conversion unit and a gas separation unit, the combined heat and power generation coupling natural gas hydrogen production control method comprises the steps that the heat and power distribution ratio of combined heat and power generation is calculated and compared with the water vapor demand quantity under the steady-state working condition, operation selection is conducted according to the comparison result, the heat and power distribution ratio of combined heat and power generation is calculated, and the final distribution ratio of heat and power is obtained. And stable supply of steam and electric quantity of the combined heat and power generation unit is realized. The gradient utilization of energy is realized, the waste heat utilization diversity is increased, and the heat utilization efficiency of the natural gas hydrogen production process is improved.

The utility model discloses a slag slurry treatment system, which belongs to the technical field of slag slurry treatment in polycrystalline silicon production and comprises a transfer tank, a cryogenic stirring tank I, a coarse filter I, a fine filter I and a high-boiling-off tower which are sequentially connected, and the top of the high-boiling-off tower is connected with a cooler and then connected with a product liquid storage tank; the bottom of the high-boiling removal tower is sequentially connected with a cooling stirring tank, a cryogenic stirring tank II, a coarse filter II and a fine filter II through pipelines, a clear liquid outlet of the fine filter II is connected with a feeding hole of the high-boiling cracking device through a pipeline, and a light component outlet in the top of the high-boiling cracking device is connected with a material inlet of the high-boiling removal tower through a pipeline I; a slag discharging opening I in the bottom of the fine filter I is connected with a feeding opening I of the cryogenic stirring tank I through a pipeline II. The problems that in the prior art, when an evaporator or / and rotary drum equipment is / are adopted for treating slag generated in the cold hydrogenation process, the number of related equipment is large, pipelines are complex, the overhaul difficulty is large, and the silane recovery rate is low are solved.

According to the LOHC coupled PEM electrolytic cell hydrogen production-hydrogen storage integrated system and the control method, the back pressure valve is arranged, the control system controls the system to be started during hydrogenation reaction, the anode pressure of the electrolytic cell is increased, and therefore the resistance of a cathode hydrogen-poor organic carrier and hydrogen permeating into the anode is increased; therefore, the permeation amount of hydrogen and hydrogen-poor organic carriers at the proton exchange membrane is reduced, the influence on the hydrogenation efficiency is reduced, the resistance in a PEM hydrogenation system can be prevented from being increased, the influence on the current density in the hydrogenation process is reduced, and the hydrogenation efficiency of the organic liquid hydrogen storage carrier is more favorably improved.

A continuous process includes supplying, to a hydrogen production unit, an energy source in the form of mechanical energy or electrical energy produced from thermal energy generated in a hydrogenation process in a hydrogenation reactor unit, and flowing a light hydrocarbon feed stream into the hydrogen production unit in the presence of a catalyst to produce a hydrogen gas enriched stream using the energy source.

A production method for cyclopentanone according to the present invention includes a transfer hydrogenation step for passing a first fluid that contains furfuryl alcohol, water, and hydrogen through a solid-bed flow reactor packed with a hydrogenation catalyst to obtain a reaction product that includes cyclopentanone and water, an extraction step for extracting the cyclopentanone from the reaction product by means of an extraction solvent to obtain an oil phase that contains the cyclopentanone, and a recovery step for recovering the cyclopentanone from the oil phase.

The invention discloses a synergistic catalyst for coking crude benzene hydrofining, a preparation method of the synergistic catalyst and a method for hydrofining coking crude benzene by using the synergistic catalyst. The synergistic catalyst is formed by filling a reactor with a synergistic catalyst Z1 and a synergistic catalyst Z2 in a layered manner according to a specific mass ratio, in the reactor, the synergistic catalyst Z1 is arranged on the upper layer of the synergistic catalyst Z2, the filling mass fraction of the synergistic catalyst Z1 is 10-24%, and the filling mass fraction of the synergistic catalyst Z2 is 76-90%. The catalyst has good selectivity, catalytic activity and stability and long cycle life under the coking crude benzene two-step hydrogenation process condition. By using the catalyst, impurities such as silicon, chlorine, sulfur, nitrogen and the like in crude benzene can be effectively removed, meanwhile, carbon deposition is reduced, the service life of the catalyst is greatly prolonged, the yield of pure benzene cannot be reduced by excessive hydrogenation, and long-period stable operation of equipment is met.

The invention belongs to the technical field of energy environmental protection, and discloses a microwave plasma alcoholysis product separation and purification system and method. The system comprises a water washing tower, a gas-liquid separation tank, a first compressor, a first cooler, a pretreatment unit, a first membrane separator, a second membrane separator, a second compressor, a second cooler and an adsorption tower. The method comprises the following steps: firstly, removing residual alcohol substances in alcoholysis products through a water washing process; purifying and recovering hydrogen in the alcoholysis product through a two-stage membrane separation process; and finally, impurities in the hydrogen are removed through an adsorption process, high-purity hydrogen is produced, and the hydrogen not only can reach the hydrogenation process standard of an oil refinery, but also can reach the fuel cell standard. The method is high in hydrogen recovery rate and has remarkable economic, environmental and social benefits.

The present invention is a method for removing sulfur from liquid hydrocarbon feedstocks and for performing hydrogenation reactions in sulfur-contaminated feedstocks, including the hydrogenation of naphthalene in the presence of sulfur compounds, using catalysts or adsorbents comprising metal oxide nanowires decorated with reduced catalytically-active metal particles. In a preferred embodiment, the adsorbent comprises zinc oxide nanowires decorated with catalytically-active metals selected from nickel, cobalt, molybdenum, platinum, palladium, copper, oxides thereof, alloys thereof, and combinations thereof. In some embodiments, the sulfur is removed through a desulfurization process without an external hydrogen supply. The process is effective for the removal of sulfur from diesel fuels and liquid fuel streams, and for deep desulfurization of natural gas streams. The process is also effective for the selective hydrogenation of naphthalene to tetralin in the presence of sulfur compounds.